The answer is 13.5<<<<<<<<<<<<<<<<
If a line is bisected by another, the 2 angles that make up the straight line will always add together for a total of 180 degrees. So the angle adjacent to the 137 degree angle will be
180 - 137 = 43 degrees.
All interior angles of a triangle add up to 180 degrees so now that we have another interior angles, we can find detailed the missing angle..
180 - 43 - 102 = 35 degrees
Now we find the adjacent able just like we did for the first angle..
180 - 35 = 145 degrees
Answer:
. In other words, there number of girls is .
Step-by-step explanation:
The average of a number of measurements is equal to the sum of these measurements over the number of measurements.
.
Rewrite to obtain:
.
For this question:
.
.
Therefore:
.
On the other hand, there are boys and girls in total. Using the formula for average:
.
From the question, this average should be equal to . In other words:
.
Solve this equation for to obtain:
.
.
.
In other words, the number of girls here is .